World of Biology on Instagram: "Pinocytosis is a cellular process where the cell engulfs small molecules and extracellular fluids, bringing them into the cytoplasm. In this animation, these solutes are represented as small spheres. The term “pinocytosis” comes from “pino,” meaning “drinking,” and it's often referred to as the cell’s way of “drinking” its environment. It’s one of the three main types of endocytosis. The internalized fluid is enclosed in tiny vesicles formed from the cell membrane